The aim of this paper is to trace two processes, interconnected in a large measure, in the labour relations of the British shipping industry from 1911 to 1929. One is the gradual transformation of the policy of the Sailors' and Firemen's Union under Havelock Wilson from aggressive militancy to one of accommodation to the shipowners' point of view. The other process to be considered is the rise and fall of four rival organisations: the Cooks' and Stewards' Union, the British Seafarers' Union, the Amalgamated Marine Workers' Union, and finally the seamen's section of the Transport and General Workers' Union.